va_display.c

/*
 * Copyright (c) 2012 Intel Corporation. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <va/va.h>
#include "va_display.h"

extern const VADisplayHooks va_display_hooks_android;
extern const VADisplayHooks va_display_hooks_wayland;
extern const VADisplayHooks va_display_hooks_x11;
extern const VADisplayHooks va_display_hooks_drm;
extern const VADisplayHooks va_display_hooks_win32;

static const VADisplayHooks *g_display_hooks;
static const VADisplayHooks *g_display_hooks_available[] = {
#ifdef ANDROID
    &va_display_hooks_android,
#else
#ifdef HAVE_VA_WIN32
    &va_display_hooks_win32,
#endif
#ifdef HAVE_VA_WAYLAND
    &va_display_hooks_wayland,
#endif
#ifdef HAVE_VA_X11
    &va_display_hooks_x11,
#endif
#ifdef HAVE_VA_DRM
    &va_display_hooks_drm,
#endif
#endif
    NULL
};

static const char *g_display_name;
const char *g_device_name;

static const char *
get_display_name(int argc, char *argv[])
{
    const char *display_name = NULL;
    int i;

    for (i = 1; i < argc; i++) {
        if (strcmp(argv[i], "--display") != 0)
            continue;
        argv[i] = NULL;

        if (++i < argc) {
            display_name = argv[i];
            argv[i] = NULL;
        }
    }
    return display_name;
}

static const char *
get_device_name(int argc, char *argv[])
{
    const char *device_name = NULL;
    int i;

    for (i = 1; i < argc; i++) {
        if (argv[i] && (strcmp(argv[i], "--device") != 0))
            continue;
        argv[i] = NULL;

        if (++i < argc) {
            device_name = argv[i];
            argv[i] = NULL;
        }
    }
    return device_name;
}

static void
print_display_names(void)
{
    const VADisplayHooks **h;

    printf("Available displays:\n");
    for (h = g_display_hooks_available; *h != NULL; h++)
        printf("  %s\n", (*h)->name);
}

static void
sanitize_args(int *argc, char *argv[])
{
    char **out_args = argv;
    int i, n = *argc;

    for (i = 0; i < n; i++) {
        if (argv[i])
            *out_args++ = argv[i];
    }
    *out_args = NULL;
    *argc = out_args - argv;
}

void
va_init_display_args(int *argc, char *argv[])
{
    const char *display_name;

    display_name = get_display_name(*argc, argv);
    if (display_name && strcmp(display_name, "help") == 0) {
        print_display_names();
        exit(0);
    }
    g_display_name = display_name;

    if (g_display_name &&
        ((strcmp(g_display_name, "drm") == 0)
        || (strcmp(g_display_name, "win32") == 0)))
        g_device_name = get_device_name(*argc, argv);

    sanitize_args(argc, argv);
}

VADisplay
va_open_display(void)
{
    VADisplay va_dpy = NULL;
    unsigned int i;

    for (i = 0; !va_dpy && g_display_hooks_available[i]; i++) {
        g_display_hooks = g_display_hooks_available[i];
        if (g_display_name &&
            strcmp(g_display_name, g_display_hooks->name) != 0)
            continue;
        if (!g_display_hooks->open_display)
            continue;
        printf("Trying display: %s\n", g_display_hooks->name);
        va_dpy = g_display_hooks->open_display();
    }

    if (!va_dpy)  {
        fprintf(stderr, "error: failed to initialize display");
        if (g_display_name)
            fprintf(stderr, " '%s'", g_display_name);
        fprintf(stderr, "\n");
        exit(1);
    }
    return va_dpy;
}

void
va_close_display(VADisplay va_dpy)
{
    if (!va_dpy)
        return;

    if (g_display_hooks && g_display_hooks->close_display)
        g_display_hooks->close_display(va_dpy);
}

VAStatus
va_put_surface(
    VADisplay          va_dpy,
    VASurfaceID        surface,
    const VARectangle *src_rect,
    const VARectangle *dst_rect
)
{
    if (!va_dpy)
        return VA_STATUS_ERROR_INVALID_DISPLAY;

    if (g_display_hooks && g_display_hooks->put_surface)
        return g_display_hooks->put_surface(va_dpy, surface, src_rect, dst_rect);
    return VA_STATUS_ERROR_UNIMPLEMENTED;
}

void
va_print_display_options(FILE *stream)
{
    fprintf(stream, "Display options:\n");
    fprintf(stream, "\t--display display | help         Show information for the specified display, or the available display list \n");
    fprintf(stream, "\t--device device                  Set device name, only available under drm and win32 displays\n");
}